US9564950B2 - Tag identification method and apparatus - Google Patents

Tag identification method and apparatus Download PDF

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Publication number
US9564950B2
US9564950B2 US14/984,041 US201514984041A US9564950B2 US 9564950 B2 US9564950 B2 US 9564950B2 US 201514984041 A US201514984041 A US 201514984041A US 9564950 B2 US9564950 B2 US 9564950B2
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Prior art keywords
tag
nfc controller
ndef
type
device host
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US20160112098A1 (en
Inventor
Zhihao JIN
Xinmiao Chang
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Huawei Device Co Ltd
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Huawei Device Co Ltd
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Priority to US15/386,472 priority Critical patent/US20170098105A1/en
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Assigned to HUAWEI DEVICE (DONGGUAN) CO., LTD. reassignment HUAWEI DEVICE (DONGGUAN) CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HUAWEI DEVICE CO., LTD.
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    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
    • G06K7/10198—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves setting parameters for the interrogator, e.g. programming parameters and operating modes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/005—Discovery of network devices, e.g. terminals
    • H04B5/0056—
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
    • G06K7/10297—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves arrangements for handling protocols designed for non-contact record carriers such as RFIDs NFCs, e.g. ISO/IEC 14443 and 18092
    • H04B5/0031—
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
    • H04B5/20—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
    • H04B5/70—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes
    • H04B5/77—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes for interrogation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18—Negotiating wireless communication parameters
    • H04W4/001—
    • H04W4/008—
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/50—Service provisioning or reconfiguring
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a tag identification method and apparatus.
  • NFC Near Field Communication
  • a Near Field Communication controller Near Field Communication Controller, NFC controller
  • NFC controller Near Field Communication Controller
  • the device host determines, according to the entire content of the NFC tag, whether a format of the NFC tag is in conformity with an NFC data exchange format (NFC Data Exchange Format, NDEF).
  • NFC Data Exchange Format NFC Data Exchange Format
  • the device host can determine the format of the NFC tag only by acquiring the entire content of the NFC tag, which causes the device host to read a large amount of data of the NFC tag and perform relatively complex operations.
  • Embodiments of the present invention provide a tag identification method and apparatus, which can implement reducing steps of determining a format of a tag by a device host in an NFC terminal, so that an NFC tag can be processed.
  • an embodiment of the present invention provides a tag identification method, including:
  • NFC Near Field Communication
  • the method before the reading, by the Near Field Communication (NFC) controller, the type of the tag, the method further includes:
  • the determining, by the NFC controller, whether the format of the tag is the NFC data exchange format NDEF according to the type of the tag includes:
  • the NFC controller determines, by the NFC controller, whether the format in the tag is the NDEF according to a file identifier of a capability container CC file in the tag.
  • the method before the receiving, by the NFC controller, the configuration command sent by the device host, the method further includes:
  • the NFC controller sends, by the NFC controller, a format function message to the device host, where the format function message carries information about whether the NFC controller has a capability of performing the NDEF detection on the tag.
  • the method before the sending, by the NFC controller, the format function message to the device host, the method further includes:
  • the sending, by the NFC controller, the format function message to the device host includes:
  • the NFC controller sends, by the NFC controller, an initialization response to the device host, where the initialization response carries the information about whether the NFC controller has a capability of performing the NDEF detection on the tag.
  • the configuration command is further used to indicate that the NFC controller performs data type detection on the tag.
  • the method further includes:
  • an embodiment of the present invention provides a tag identification apparatus, including:
  • a reading module configured to read a type of a tag
  • a determining module configured to determine whether a format of the tag is an NFC data exchange format NDEF according to the type of the tag
  • a sending module configured to send a notification message to a device host when the determining module determines that the format of the tag is the NDEF, where the notification message includes that the format of the tag is the NDEF.
  • the apparatus further includes:
  • a receiving module configured to receive a configuration command sent by the device host, where the configuration command is used to indicate whether the NFC controller performs the NDEF detection on the tag.
  • the determining module is specifically configured to:
  • the type of the tag determines whether the format of the tag is the NDEF according to header read-only memory HR0 in the tag; when the type of the tag is Type 2, determine whether the format of the tag is the NDEF according to a capability container CC in the tag; when the type of the tag is Type 3, determine whether the format of the tag is the NDEF according to System Code in the tag; and when the type of the tag is Type 4, determine whether the format of the tag is the NDEF according to a file identifier of a capability container CC file in the tag.
  • the sending module is further configured to send a format function message to the device host, where the format function message carries information about whether the NFC controller has a capability of performing the NDEF detection on the tag.
  • the receiving module is further configured to receive an initialization command sent by the device host;
  • the sending module is further configured to send an initialization response to the NFC controller, where the initialization response carries the information about whether the NFC controller has a capability of performing the NDEF detection on the tag.
  • the configuration command is further used to indicate that the NFC controller performs data type detection on the tag.
  • the receiving module is further configured to receive, by using an NDEF radio frequency interface, a read/write command sent by the device host;
  • the apparatus further includes:
  • a converting module configured to convert the read/write command into an NDEF read/write command
  • a processing module configured to perform data reading/writing on the tag according to the NDEF read/write command.
  • an embodiment of the present invention provides a tag identification apparatus, where the apparatus includes a Near Field Communication NFC controller and a device host, and the NFC controller is connected to the device host, where:
  • the NFC controller is configured to read a type of a tag; and determine whether a format of the tag is an NFC data exchange format NDEF according to the type of the tag; and the NFC controller sends a notification message to the device host when the NFC controller determines that the format of the tag is the NDEF, where the notification message includes that the format of the tag is the NDEF; and
  • the device host is configured to receive the notification message sent by the NFC controller.
  • the device host is further configured to send a configuration command to the NFC controller, where the configuration command is used to indicate whether the NFC controller performs the NDEF detection on the tag;
  • the NFC controller is further configured to receive the configuration command sent by the device host.
  • the NFC controller is specifically configured to: when the type of the tag is Type 1, determine whether the format of the tag is the NDEF according to header read-only memory HR0 in the tag; when the type of the tag is Type 2, determine whether the format of the tag is the NDEF according to a capability container CC in the tag; when the type of the tag is Type 3, determine whether the format of the tag is the NDEF according to System Code in the tag; and when the type of the tag is Type 4, determine whether the format of the tag is the NDEF according to a file identifier of a capability container CC file in the tag.
  • the NFC controller is further configured to send a format function message to the device host, where the format function message carries information about whether the NFC controller has a capability of performing the NDEF detection on the tag.
  • the device host is further configured to send an initialization command to the NFC controller;
  • the NFC controller is further configured to send an initialization response to the device host after receiving the initialization command sent by the device host, where the initialization response carries the information about whether the NFC controller has a capability of performing the NDEF detection on the tag.
  • the configuration command is further used to indicate that the NFC controller performs data type detection on the tag.
  • the device host is further configured to establish an NDEF radio frequency interface for performing data transmission with the NFC controller after receiving the notification message sent by the NFC controller.
  • the device host is further configured to send, by using the NDEF radio frequency interface, a read/write command to the NFC controller;
  • the NFC controller is further configured to receive, by using the NDEF radio frequency interface, the read/write command sent by the device host; convert the read/write command into an NDEF read/write command; and perform data reading/writing on the tag according to the NDEF read/write command.
  • an NFC controller reads a type of a tag; and determines whether a format of the tag is an NFC data exchange format according to the type of the tag; and the NFC controller sends a notification message to a device host when the NFC controller determines that the format of the tag is the NFC data exchange format, where the notification message includes information that the format of the tag is the NFC data exchange format.
  • the embodiments of the present invention can implement reducing steps of determining a format of a tag by a device host in an NFC terminal, so that the NFC tag can be processed.
  • FIG. 1 is a flowchart of a tag identification method according to an embodiment of the present invention
  • FIG. 2 is a flowchart of another tag identification method according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of a transmission structure, between a device host and an NFC controller and between the NFC controller and a tag, in a tag identification method according to an embodiment of the present invention
  • FIG. 4 is a schematic structural diagram of a tag identification apparatus according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of another tag identification apparatus according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of still another tag identification apparatus according to an embodiment of the present invention.
  • an embodiment of the present invention provides a tag identification method, and the method includes:
  • An NFC controller reads a type of a tag.
  • the NFC controller is a controller in an NFC terminal.
  • the NFC terminal may be a terminal having an NFC function, such as a mobile phone, a tablet computer, or a camera.
  • the NFC controller is a logical entity responsible for transmitting data on an NFC radio frequency interface.
  • an NFC controller refers to an NFC chip in the mobile phone.
  • the tag is an NFC tag.
  • Types of the NFC tag are Type1, Type2, Type3, and Type4.
  • the NFC controller reads the type of the tag, reference may be made to the NFC Forum Analog standard, the NFC Forum Digit standard, and the NFC Forum Activity standard.
  • the NFC controller may discover the tag and acquire an attribute of the tag by means of radio frequency discovery.
  • the attribute of the tag may include a format of the tag, a data type of the tag, a function supported by the tag, and the like.
  • the function supported by the tag herein refers to a capability that is required in a process of establishing communication between the NFC controller and the tag.
  • the NFC controller determines whether a format of the tag is an NDEF according to the type of the tag.
  • the NDEF defines an encapsulation format of information during information exchange, where the information is transmitted between NFC terminals or between an NFC terminal and an NFC tag.
  • the NDEF may be a lightweight binary message format, and it can be used to encapsulate one or more user-defined data of any type and any size.
  • the NFC controller determines whether the format of the tag is the NDEF according to header read-only memory (Header Read-Only Memory, HR)0 in the tag. Specifically, a length of HR0 is one byte, and when four high order bits of HR0 is 0001b, the NFC controller determines that the format of the tag is the NDEF.
  • HR header read-only memory
  • the NFC controller determines whether the format of the tag is the NDEF according to a capability container (Capability Container, CC) in the tag.
  • Capability Container Capability Container
  • a length of the CC is four bytes, and when a value of the first byte is E1h (where E1 is in hexadecimal format), the NFC controller determines that the format of the tag is the NDEF.
  • the type of the tag is Type 3
  • the NFC controller determines whether the format of the tag is the NDEF according to System Code in the tag.
  • a length of the System Code is two bytes, and when a value of the System Code is 12FCh (where 12FC is in hexadecimal format), the NFC controller determines that the format of the tag is the NDEF.
  • the NFC controller determines whether the format of the tag is the NDEF according to a file identifier of a capability container (Capability Container, CC) file in the tag. Specifically, a length of the file identifier of the CC file is two bytes, and when a value of the file identifier of the CC file is E103h (where E103 is in hexadecimal format), the NFC controller determines that the format of the tag is the NDEF.
  • Capability Container Capability Container
  • the NFC controller may further determine a data type of the tag.
  • the tag has eight data types. Specifically, the NFC controller acquires data type information from a TNF field of the tag (Type 1, Type 2, Type 3, and Type 4), and determines the data type of the tag according to content of the data type information.
  • a value of the TNF field may be 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, or 0x07, and the NFC controller may determine the data type information of the tag according to the value of the TNF field.
  • the data type of the tag is specifically a type of an NDEF message.
  • the NFC controller sends a notification message to a device host when the NFC controller determines that the format of the tag is the NDEF, where the notification message includes information that the format of the tag is the NDEF.
  • the device host is responsible for managing a running environment of the NFC terminal and a peripheral, including managing the NFC controller, such as initialization, configuration and power management.
  • the device host may refer to a CPU of the mobile phone.
  • the NFC controller sends the notification message to the device host; for example, the notification message is a radio frequency discovery notification RF_DISCOVER_NFT.
  • RF_DISCOVER_NFT A specific form of RF_DISCOVER_NFT is shown in Table 1.
  • NDEF Info indicates NDEF information, which occupies one byte (1 Octet);
  • X indicates whether a format of a tag is an NDEF
  • the NFC controller determines that the format of the tag is not the NFC data exchange format
  • the NFC controller still can send a notification message to the device host.
  • the notification message sent by the NFC controller to the device host may further include the data type of the tag.
  • the NFC controller sends RF_DISCOVER_NFT to the device host, and a specific form of RF_DISCOVER_NFT is shown in Table 2.
  • Type Name Format indicates information about a data type of a tag, and occupies one byte (1 Octet);
  • the NFC controller reads the type of the tag; and determines whether the format of the tag is the NFC data exchange format according to the type of the tag; and the NFC controller sends the notification message to the device host when the NFC controller determines that the format of the tag is the NFC data exchange format, where the notification message includes information that the format of the tag is the NFC data exchange format.
  • this embodiment of the present invention can implement reducing steps of determining the format of the tag by the device host in the NFC terminal, so that the NFC tag can be processed.
  • a tag identification method is provided. As shown in FIG. 2 , the method includes:
  • An NFC controller sends a format function message to a device host, where the format function message carries information about whether the NFC controller has a capability of performing NDEF detection on a tag.
  • the NFC controller sends the format function message to the device host in the following two manners:
  • the device host sends an initialization command to the NFC controller; the NFC controller sends an initialization response to the device host after receiving the initialization command, that is, the format function message is specifically the initialization response, where the initialization command is used to initialize the NFC controller.
  • the device host sends CORE_INIT_CMD (an initialization command) to the NFC controller, that is, the device host initializes the NFC controller; and then the NFC controller feeds back CORE_INIT_RSP (an initialization response) to the device host after receiving CORE_INIT_CMD.
  • CORE_INIT_RSP response when a Supported RF Interface field includes 0x04, that is, NDEF Access RF Interface, it indicates that the NFC controller has a capability of detecting the NDEF.
  • Manner 2 The device host sends a format query command to the NFC controller; the NFC controller sends an format query response to the device host after receiving the format query command, that is, the format function message is specifically the format query response.
  • the device host sends FORMAT_INQ_CMD (a format query command) to the NFC controller, and then the NFC controller feeds back FORMAT_INQ_RSP (a format query response) to the device host after receiving FORMAT_INQ_CMD.
  • FORMAT_INQ_CMD a format query command
  • FORMAT_INQ_RSP a format query response
  • the NFC controller may further add, to a message sent to the device host, information about whether the NFC controller has a capability of performing NDEF detection on the tag.
  • the device host sends a configuration command to the NFC controller, where the configuration command is used to indicate whether the NFC controller performs NDEF detection on the tag.
  • the device host sends a CORE_SET_CONFIG_CMD command to the NFC controller, where the CORE_SET_CONFIG_CMD command includes a format parameter.
  • a specific form of the format parameter is shown in Table 3.
  • Parameter 1 indicates a format parameter, and the format parameter has three bytes (3 Octets); ID (identifier) occupies one byte (1 Octet), and 0xA0 indicates an identifier of the format parameter;
  • Len (length) occupies one byte (1 Octet), and 1 indicates that a length of Val is one byte;
  • Val occupies one byte (1 Octet), and when a value of Val is 0000 0000, it indicates that the configuration command instructs the NFC controller not to perform NDEF detection on a tag; when a value of Val is not zero (for example, 0000 0001), it indicates that the configuration command instructs the NFC controller to perform NDEF detection on the tag.
  • a value of a byte occupied by Parameter 1 is not limited in this embodiment; when a byte occupied by ID, Len, or Val included in Parameter 1 changes, the value of the byte occupied by Parameter 1 may also change.
  • the configuration command is further used to indicate that the NFC controller performs data type detection on the tag.
  • the CORE_SET_CONFIG_CMD command sent by the device host to the NFC controller is further used to indicate that the NFC controller performs data type detection on the tag
  • the CORE_SET_CONFIG_CMD command includes a format parameter and a data type parameter, where there are two representation manners for CORE_SET_CONFIG_CMD, and the specific forms are shown in Table 4 and Table 5.
  • Parameter 2 indicates a data type parameter, and the data type parameter has three bytes (3 Octets);
  • ID occupies one byte (1 Octet), and 0xA1 indicates an identifier of the data type parameter;
  • Len (length) occupies one byte (1 Octet), and 1 indicates that a length of Val is one byte;
  • Val occupies one byte (1 Octet), and when a value X of Val is 0101 0000, it indicates that the configuration command instructs the NFC controller to perform detection on the second and fourth data types.
  • the tag has eight data types; the device host arranges the eight data types in a specific sequence, and makes each bit of a value of Val correspond to one data type. When a bit in X is 1, it indicates a data type corresponding to the bit needs to be detected; when the bit is 0, it indicates a data type corresponding to the bit does not need to be detected.
  • a sequence, from the first type to the eighth type, of the eight data types is as follows: 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, and 0x07.
  • the first bit is corresponding to 0x00
  • the second bit is corresponding to 0x01
  • the third bit is corresponding to 0x02
  • the fourth bit is corresponding to 0x03
  • the eighth bit is corresponding to 0x07.
  • the NFC controller detects whether the data type of the tag is either of the two data types: 0x01 or 0x03.
  • Parameter 2 indicates a data type parameter, and the data type parameter has three bytes (3 Octets);
  • ID occupies one byte (1 Octet), and 0xA1 indicates an identifier of the data type parameter;
  • Len (length) occupies one byte (1 Octet), and 1 indicates that a length of Val is one byte;
  • Val occupies one byte (1 Octet), and when a value of Val is 0000 0000, it indicates that the configuration command instructs the NFC controller not to perform data type detection on a tag; when a value of Val is not zero (for example, 0000 0001), it indicates that the configuration command instructs the NFC controller to perform data type detection on the tag.
  • step 102 in FIG. 1 for descriptions of the device host, the NFC controller, and the NDEF, reference may be made to step 102 in FIG. 1 .
  • the NFC controller sends a configuration command response message to the device host.
  • the NFC controller After receiving the configuration command sent by the device host, the NFC controller sends the configuration command response message to the device host, where the configuration command response message may be CORE_SET_CONFIG_RSP.
  • the device host sends a radio frequency discovery start command to the NFC controller.
  • the device host After receiving the configuration command response message sent by the NFC controller, the device host sends the radio frequency discovery start command to the NFC controller; or the device host waits, after sending the configuration command, for a predetermined time to start to send the radio frequency discovery start command to the NFC controller. For example, the device host sends RF_DIS_CMD (a radio frequency discovery start command) to the NFC controller.
  • RF_DIS_CMD a radio frequency discovery start command
  • a range of the predetermined time is not limited in this embodiment.
  • the device host starts to send the radio frequency discovery start command to the NFC controller 200 ms after sending the configuration command to the NFC controller.
  • the NFC controller sends a radio frequency discovery response message to the device host, and starts radio frequency discovery to read a type of the tag.
  • the radio frequency discovery response message includes notification information that the NFC controller has received the radio frequency discovery start command.
  • the NFC controller sends RF_DIS_RSP (a radio frequency discovery response message) to the device host.
  • the NFC controller determines whether a format of the tag is an NDEF according to the type of the tag.
  • step 102 in FIG. 1 For a manner in which the NFC controller determines whether a format of the tag is an NDEF, reference may be made to step 102 in FIG. 1 , and details are not described herein again.
  • the NFC controller determines the data type of the tag.
  • step 207 is an optional step, and the NFC controller needs to execute step 207 only when the configuration command further includes information indicating that the NFC controller detects the data type of the tag. Therefore, in FIG. 2 , step 207 is expressed with a dashed line box.
  • step 102 in FIG. 1 For a manner in which the NFC controller determines a data type of the tag, reference may still be made to step 102 in FIG. 1 .
  • the NFC controller sends a notification message to the device host.
  • step 103 in FIG. 1 For detailed descriptions of the notification message, reference may be made to step 103 in FIG. 1 .
  • the device host When the format of the tag is the NDEF, the device host establishes an NDEF radio frequency interface.
  • the NDEF radio frequency interface is an interface between the device host and the NFC controller.
  • the NFC controller sends data transmitted between the NFC controller and the tag (where the format of the tag is the NDEF) to the device host by using the NDEF radio frequency interface; or the device host first sends, to the NFC controller by using the NDEF radio frequency interface, data to be sent to the tag, and then the NFC controller forwards the data to the tag.
  • the device host sends RF_DISCOVER_SELECT_CMD (a radio frequency discovery select command) to the NFC controller, where the RF_DISCOVER_SELECT_CMD includes information that the device host has established the NDEF radio frequency interface.
  • RF_DISCOVER_SELECT_CMD A specific form of RF_DISCOVER_SELECT_CMD is shown in Table 6.
  • RF Discovery ID indicates a radio frequency discovery identifier, and is used to identify a tag corresponding to radio frequency discovery
  • XX indicates an identifier of the tag
  • RF Protocol indicates a manner of communication between the NFC controller and the tag (for example, the Tag Protocol);
  • RF Interface indicates an interface between the device host and the NFC controller (for example, the NDEF radio frequency interface).
  • the NFC controller may convert the data into data in a format that can be received by the tag.
  • the tag is a tag that is identified by an RF Discover ID corresponding to the NDEF radio frequency interface.
  • an interface used by the NFC controller to perform interaction with the device host may be an NFC controller interface (NFC controller Interface, NCI).
  • NCI NFC controller Interface
  • the NCI is a logical interface between the device host and the NFC controller, and the NCI is configured to transmit various commands between the device host and the NFC controller.
  • the device host sends a read/write command to the NFC controller by using the NDEF radio frequency interface.
  • the read/write command is used to acquire the data in the tag, or the read/write command is used to modify the data in the tag.
  • the NFC controller converts the read/write command into an NDEF read/write command, and then performs data reading/writing on the tag according to the NDEF read/write command.
  • a read/write command received by a Type 1 tag is Read
  • a read/write command received by a Type 2 tag is R.
  • the NFC controller converts, by using the NDEF radio frequency interface, the read/write command sent by the device host into NDEF read/write commands corresponding to different types of tags.
  • the NDEF read/write command may be an NDEF read command, or may be an NDEF write command.
  • the NFC controller sends an NDEF read command to the NFC tag, where the NDEF read command instructs the NFC tag to send data in the tag.
  • the NFC tag After receiving the NDEF read command, the NFC tag sends the data in the tag to the NFC controller.
  • the NFC controller sends the data in the tag to the device host.
  • the device host sends the received data in the tag to an NFC application.
  • the device host may receive a registration message sent by the NFC application. Specifically, after being installed or when running for the first time, the NFC application performs registration with the device host according to a capability, of processing a data type of a tag, of the NFC application. For example, a browser application program supporting NFC scanning may register a data type, namely URI (0x03), with the device host.
  • the device host sends the data in the tag to a running application.
  • running applications include a browser supporting NFC scanning, a video player supporting the NFC scanning, and a photo album supporting the NFC scanning.
  • the device host sends the data in the tag to the foregoing three running applications, and the foregoing three running applications process the tag according to an actual situation (a capability, of processing a data type of a tag, of an application).
  • the device host sends the data in the tag to an application corresponding to the data type.
  • running applications include a browser supporting NFC scanning, a video player supporting the NFC scanning, and a photo album supporting the NFC scanning.
  • the data type of the tag is URI (0x03)
  • the device host sends, according to the data type of the tag, the data in the tag to the browser supporting the NFC scanning.
  • the device host in the NFC terminal determines the format of the tag and the data type of the tag by using the NFC controller. After obtaining the format of the tag and the data type of the tag, the device host sends, according to the data type of the tag, data in the tag to an application corresponding to the data type of the tag for processing, so that the device host can determine the format of the tag and the data type of the tag without requiring analyzing entire content of the tag; in addition, the NDEF radio frequency interface established by the device host can enable the data in the NFC tag to be transmitted between the device host and the NFC controller, thereby achieving an objective that the tag can be processed by the device host.
  • a transmission interface between a device host and an NFC controller is clearly described.
  • command transmission between the device host and the NFC controller is performed by using an NCI; and after the device host receives the notification message sent by the NFC controller, the device host establishes the NDEF radio frequency interface, and NDEF data transmission between the device host and the NFC controller is performed by using the NDEF radio frequency interface.
  • an embodiment of the present invention provides a tag identification apparatus 40 , including: a reading module 401 , a determining module 402 , and a sending module 403 .
  • the apparatus may be a unit of an NFC terminal, for example, an NFC controller.
  • the reading module 401 is configured to read a type of a tag.
  • the determining module 402 is configured to determine whether a format of the tag is an NDEF according to the type of the tag, and send a result of the determining to the sending module 403 .
  • the sending module 403 is configured to send a notification message to a device host when the determining module 402 determines that the format of the tag is the NDEF, where the notification message includes that the format of the tag is the NDEF.
  • step 103 in FIG. 1 For detailed descriptions of the notification message, reference may be made to step 103 in FIG. 1 .
  • the tag identification apparatus 50 further includes: a receiving module 404 , a converting module 405 , a processing module 406 .
  • the sending module 403 sends a format function message to the device host, where the format function message carries information about whether the NFC controller has a capability of performing NDEF detection on the tag.
  • the format function message may be an initialization response.
  • the receiving module 404 receives an initialization command sent by the device host; then the sending module 403 sends the initialization response to the NFC controller, where the initialization response carries the information about whether the NFC controller has a capability of performing NDEF detection on the tag.
  • the receiving module 404 receives a configuration command sent by the device host, where the configuration command is used to indicate whether the NFC controller performs NDEF detection on the tag. It can be understood that, when the configuration command indicates that the NFC controller needs to perform NDEF detection on the tag, the reading module 401 reads the type of the tag.
  • the configuration command is further used to indicate that the NFC controller performs data type detection on the tag.
  • the determining module 402 determines whether the format of the tag is the NDEF according to HR0 in the tag; when the type of the tag is Type 2, the determining module 402 determines whether the format of the tag is the NDEF according to a CC in the tag; when the type of the tag is Type 3, the determining module 402 determines whether the format of the tag is the NDEF according to System Code in the tag; and when the type of the tag is Type 4, the determining module 402 determines whether the format of the tag is the NDEF according to a file identifier of a CC file in the tag.
  • the receiving module 404 receives, by using an NDEF radio frequency interface, a read/write command sent by the device host, the converting module 405 converts the read/write command into an NDEF read/write command, and then the processing module 406 performs data reading/writing on the tag according to the NDEF read/write command.
  • the device host in the NFC terminal determines the format of the tag and the data type of the tag by using the NFC controller. After obtaining the format of the tag and the data type of the tag, the device host sends, according to the data type of the tag, data in the NFC tag to an application corresponding to the data type of the tag for processing, so that the device host can determine the format of the tag and the data type of the tag without requiring analyzing entire content of the NFC tag.
  • an embodiment of the present invention provides a tag identification apparatus 60 , including: an NFC controller 601 and a device host 602 , where the NFC controller 601 is connected to the device host 602 .
  • the NFC controller 601 is configured to read a type of a tag; and determine whether a format of the tag is an NFC data exchange format NDEF according to the type of the tag; and the NFC controller 601 sends a notification message to the device host 602 when the NFC controller 601 determines that the format of the tag is the NDEF, where the notification message includes that the format of the tag is the NDEF.
  • the NFC controller 601 determines whether the format of the tag is the NDEF according to HR0 in the tag; when the type of the tag is Type 2, the NFC controller 601 determines whether the format of the tag is the NDEF according to a CC in the tag; when the type of the tag is Type 3, the NFC controller 601 determines whether the format of the tag is the NDEF according to System Code in the tag; and when the type of the tag is Type 4, the NFC controller 601 determines whether the format of the tag is the NDEF according to a file identifier of a CC file in the tag.
  • step 103 in FIG. 1 For detailed descriptions of the notification message, reference may be made to step 103 in FIG. 1 .
  • the device host 602 is configured to receive the notification message sent by the NFC controller 601 .
  • the NFC controller 601 is further configured to send a format function message to the device host 602 , where the format function message carries information about whether the NFC controller 601 has a capability of performing NDEF detection on the tag.
  • the format function message may be an initialization response.
  • the device host 602 first sends an initialization command to the NFC controller 601 .
  • the NFC controller 601 sends the initialization response to the device host 602 , where the initialization response carries the information about whether the NFC controller has a capability of performing NDEF detection on the tag.
  • the device host 602 is further configured to send a configuration command to the NFC controller, where the configuration command is used to indicate whether the NFC controller 601 performs NDEF detection on the tag.
  • the NFC controller 601 is further configured to receive the configuration command sent by the device host 602 .
  • the configuration command is further used to indicate that the NFC controller 601 performs data type detection on the tag.
  • the device host 602 is further configured to establish an NDEF radio frequency interface for performing data transmission with the NFC controller 601 after receiving the notification message sent by the NFC controller 601 .
  • the device host 602 is further configured to send a read/write command to the NFC controller 601 by using the NDEF radio frequency interface.
  • the NFC controller 601 is further configured to receive, by using the NDEF radio frequency interface, the read/write command sent by the device host 602 ; convert the read/write command into an NDEF read/write command; and perform data reading/writing on the tag according to the NDEF read/write command.
  • the apparatus shown in FIG. 6 may be an NFC terminal, where the NFC terminal may be a terminal having an NFC function, such as a mobile phone, a tablet computer, and a camera.
  • the NFC terminal may be a terminal having an NFC function, such as a mobile phone, a tablet computer, and a camera.
  • the device host in the NFC terminal determines the format of the tag and the data type of the tag by using an NFC controller. After obtaining the format of the tag and the data type of the tag, the device host sends, according to the data type of the tag, data in the NFC tag to an application corresponding to the data type of the tag for processing, so that the device host can determine the format of the tag and the data type of the tag without requiring analyzing entire content of the NFC tag.
  • the disclosed apparatus and method may be implemented in other manners.
  • the described apparatus embodiment is merely exemplary.
  • the module or unit division is merely logical function division and may be other division in actual implementation.
  • a plurality of units or components may be combined or integrated into another system, or some features may be ignored or not performed.
  • the displayed or discussed mutual couplings or direct couplings or communication connections may be implemented by using some interfaces.
  • the indirect couplings or communication connections between the apparatuses or units may be implemented in electronic, mechanical, or other forms.
  • the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • functional units in the embodiments of the present invention may be integrated into one processing unit, or each of the units may exist alone physically, or two or more units are integrated into one unit.
  • the integrated unit may be implemented in a form of hardware, or may be implemented in a form of a software functional unit.
  • the integrated unit When the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, the integrated unit may be stored in a computer-readable storage medium. Based on such an understanding, the technical solutions of the present invention essentially, or the part contributing to the prior art, or all or some of the technical solutions may be implemented in the form of a software product.
  • the computer software product is stored in a storage medium and includes several instructions for instructing a computer device (which may be a personal computer, a server, or a network device) or a processor to perform all or some of the steps of the methods described in the embodiments of the present invention.
  • the foregoing storage medium includes: any medium that can store program code, such as a USB flash drive, a removable hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk, or an optical disc.
  • program code such as a USB flash drive, a removable hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk, or an optical disc.

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